Clamp.



V u i so that irl-.the operation' of enameling er of which the` follwinggis a speeiiicatioli..f11r

IcLIF'roN T. MITCHELL, r or i PI'LILADELPHIA,.l

MANUFACTURING COMPANY, on PHILADELPHIA; PENNSYLVANIA, A V1cORP@ILAVJJIDN fOEj:

NEW JERSEY.`

To all whom 'it may concern: i' f i Be it known that I, CLIFTON T. MircnELL, acitizen of the United-States-,1residinginthefk city 'and county of PhiladelphiagfPerinsylv-a'-- nia, have invented a new 'and useful ,Lla'rhp,`y`

lMyA invention `relates toa novel construe-f1' tion of -a clamp `o`rjfastenerfandis adapted*L for stretching skins, hides,-.fabricsA orpther materials 1 taut-or for holding or suspendingk various materials orfarticl'esm` The `invention furtherf consists E of nevel featuresWhereby-when thedevice is used fr` stretchingsldns the entire operative me'chan` y ism is belowthe surface of theskinsorhides otherwise treating the skins,`V `the' workmen can'work to the. extreme 'edgeof Vtheskin without loss of time,.astl1ecl ampisof such` construction as to loffer jno:A obstruction free manipulation *oftfevery'portion sof the surface of the `leather during the* l treatment. vi 4While AI have shown v.and.fdescfrilied In l novel `invention- Kas'beingfuseful .and a p11#1 cable in leather factories .for'stretching' hides',vr it is apparent thatrit maylalso be used lfori' stretching fabrics' *fori various materials '-,or I suspending articles" and is itselfl simple ini ccnv`struction and may `beicheaply manufactured and .soldat a comparativelyflow cost',v and is very durable when"'used Afor stretching leather so that-my invention Obviates the "necessit of makingholesinthesame, asis. 35

require when the-lold `Afinishingf'toggle or fasteneris used.- Itwill be further apparent that leyi my! present invention have simplied the construction heretofore em-plc ed, since mydevice consistsofv but twov mem ers which can beleasilyistruckfu from sheet' metal and the;z arrangemenito the'l arts is such that thevfpfpfer line or edge oft e'm'ovf 1 able jaw is ada" ted topmove Vin a substan-f tially vertical 1' eftowards the under surface v --of the upper or iix'ed j aw, whereby the mate-4v rial to be clampedvis held between theangle or? edge at the u per-portioii'of 'the'lower jaw and against te under surfacefofs--the lupper or stationary jaw; thecons'tructionof said. movable jaw being. such thatth'e' iill'fcfy the* fastening device "is exerted drec't y 'thereon without assing through aneyeer etherereg tion of t e body which carriesoru n WV 'ch the stationaryfjawis formed: illustra For the purpose-oi specmmeonefmteeri Pitman v rappresen-'mea Nvmb2s,"-1so1.fsa,m. mams;

' ratentealnetae, 1908s?. 'i

` of `which-#my invention consists'ffcan' h .ariouslyarrai'1gedv and organizedf'and i l* l accoinpanying'drawingsI .have showi- ,l A,tain embodiments thereof which ,I :found in practice to give', satisfactory gand"r li ble results;4 lthough it is to be understood i f' thatmydnvention is not-limitedto this spe-L4v =cicxar1fangement= .and` organization of,;fthesefff Hinstrumentalitiesl. Q f

'1 Fi cred represents `'a perspectivfevview,of arjen1 "nove f-constructionjeffa clampA embodying i,

my' invention; Eig. l2replesentsa secticnalg jviewtof the .clamp inverted from the tion. seen in'Fig. 1 showing the `position 'of "the" Parts' assembled y.in .theses 'of ,i

`theleatlfi'erjo'1' other materialto be-stretcE-: Fig *3 Presentes l-1 .4 .i ,nel"view; oath@ 'clamP Slm-Wing 'the jaws in closed pentium y theeactg; of gripping-fthe' ,materialtm bei;

stretched." FigL- lt- \represents an enlargediey view of thedevice :seenV 'shewl'ng'u vspecially 1the manner' in'which t i edge'ofthe f 1 'ymovable lower jawinolves towards or y instf'" theg'unde'r side ofthe upper'javlin'it ela i i y of gripping the material `to bastretch'edfg'., -Figs vre resents a "lanvievvfffotltliefdevice;` l .seen in lig. 1,showingthernovable'j'avn ,being provided? serrations or toet `B" 6 represents afsectionalyiew of anqther i ein odnnentci'ihyjnventicn.:1Fig...7}repijea 90. Gents fger'spectiveview Dienstbetrieb merit o lnyllir'iver'itigin."A rsentswij 830503@ YlQW 0f Figishowllgli. .Bll of serting. thelehtlrfr' otherfmateril to, vbe" stretched,` Asides hetweenthejavis 'ofige vthe'cl'ainp; Siixiilar' 'mimerilss ici (reference 4indicate @merendine 'Per T fintlieiguresrJiu Refefringtbth drawin 1:.1. d'vnetesmy novelclarnp, y consisting o 'the bodB 10Q: thesidf 2.-, whichlare ioiried by' the trans-lf verse, preferably'- .intcgra1, ,top mei'nh 3 `a'n'dl 4, said member 3 having its 1re' ition5v roiecti'ngorfextentiedt inwartll short* lstan'ce, 'soy sis-to 'form asta `'jaw-.whose lower portion-s fadxgited to .with theppef .porren-er .e g1.

movable 6,. "Which, forms l `Qinne yInitial. of t e'leverjfcrfarm 7, Whichfisipif atSn; the 'sides'Z 'abve referredto,1t

. 1spreferably in point of contact of the noticed'l that the point'of pivotal connection aline or plane below the4 jaws 'and 6, whereby the leather is stretched'to the desired extent. i desire vto alsocall attentiont'o the contour ofthe arm or lever 7, since `the same is preferably cunved or'has-the cp'ntour'of an obtuse angle, whereby the :line of ,contactl l between the co-acting jaws 5 and- 6is above 4the pivotall point 8, asis also thepreferred point of attachment of the endof theA con nection 9;. r

, vmannerinwhich'the 1.5

`I desire' to call especial atten/tion tolthey edge, 11 of the jaw 6 advances towards the under wallpf the sta.

. tionaryv jaw` 5 fand the 'materiali to be stretched, as will be larged view seen in Fig. 4, when a ull is im-j parted upon the connection'Q, it eingunderstood that the sides 2 are recessed as indi-` cated at 1-2lso as tolenable the edge of the:

)material to be stretched 'to be readily in` s'ertedihto position between the jaws 5 and 6.

the position seen in Fig. merely taking hold of the rThe operation is as follows: Theclamp is. preferably first inverted intov substantially 2 by the operator outerlextremity of the 'lever 7, whereupon the. forward top L I y piece. 3 and 4its adjuncts at-once drop into the position seen in 111g. 2 and the jaws 5 and 6 -are opened. The edge lof lthe leather -or vother materialto bev stretched is inserted into the recesses; 12, so that it passes-under the I jaw 5, sowhen a pull isimparted to the con-` fro nection 9, the edge` 11 of the j awvemoves tol`ward the under side fof-the jaw 5, so that lsaid edge 11 is' forcibly'indented -into the material 10', las' indicated in `Fig. 4' at 11, and

a further pull on-.the connections- 9 will cause 'the material to. beheld with still greater force s tgainstthe underisideof said jaw 5,- a'nd the greater the force or pull which is ap-v plied to the connection 9, the' tighterwillbe the grip or:vbit`e ofthe jaws 5 and 6, as will be understood from Figs.' '3- and 4.

In themccnstructionvsefen,inf-Fig. 5, the

' "clamp is' constructed substantially the same in ,all respects. as .beforcdescribed with respect to.l Figs. 'to fccpftion that"in.this"embodiment I provide-I theterlninal of the-jaw 6 with the-serrations v or teeth'12 which may be employed or dis" 'pensedwith according to requirements.

.inlarge quantities. y

I desire to emphasize the structural fea-v tures,whereby f-Figs. 5. to 7 isfdi It will be apparentthat in 4all of thede# vices seen in Figs. 1 to 5 inclusive, the movablejaw 6 is confined and guided to the necessary extent between the sides 2 .and 'since i the device consists ofonly two pieces .of sheet a vmetal., it canlv .be 'very'ch'eaply manufactured mg present device as seen in erentiated from other de- Avices by reason of the upper'sharp edgell of hejaw 6 -being so located or correlated with masas the under side of the jaw 5 that said edge 11 has an upward movement towards the material to be clamped and towards said jaw 5 in substantially anvertical line, as will be understood trom big. 4, so that when the clamp is inverted from the [position seen in lfig. 2 to :the positions seen ih Figs. 3 and 4 by the pull on the connection 9, the leather or other material 10 will be gripped between the jaws 5 and 6 with greater tightness than vin any other device with which l am familiar and the pull upon 'the connection 9 is utilized to a maximum extent both to grip and to stretch the material 1Q. v

In the construction seen .point 19 located in advance of the cross piece 14, said lever 18 terminating in the movable jaw 20, whose construction will be apparent from Kllig. 6, said jaw being serrated -as shown in'hig. 5,-if desired, or being employed without serrations, according to requirements. "The manner of Uripping`and stretching thematerial. will be cllearly understood from the-'descriptionl already given in respect to Figs'. 2 and 4 and I deem it unnecessary to describe the same in further detail,

' it however, being understood that a suitable -connection is to be inserted in the eye 21 which in operation and function corresponds to the connection 9 -already described.

Inthe construction seen in Flgs. 7 and 8 I have' shown another. embodiment' of my invention wherein 22 designates a clamp, the samcconsistingof the base portion 23 havmg the ears or lugs 24 at one extremity while the' 'opposite extremity-25 has the backwardly de- ,iected portion 26- which terminates in the stationary jaw 27, juxtaposed to which is the movable jaw 28 which forms the terminal of the-lever 29,-whicli is pivoted at 30 in the ears 24, a suitable fastening 31 being secured -to the free end of the lever 29, which latter is preferably curved or-given the shape of an obtuse angle, as will be'understood from said Figs. 7 and 8, whereby the upon the connection 231 will causeithe' leather 10 to be more-tightly gripped and stretched according as the force :or pull on4 vcord 3,1, increases. The manneof applying the clamp seen in Figs.- 7 and'8'to the leather will be understood from Fig. 8, the operator inverting the clam j and holding the lever 29 in one hand whereupon the base orbody 23 will drop by j in Fig. 6 'the sides 13. are constructed substantially as seen in ravity until it, strikes the jaw- 28. The

eather 10 is then inserted in position between the jaws 28 and. 27 and a pull being exerted tighter the pull on `the connection the .more

`familiar'.

tightly will the material be gripped between the jaws and stretched.

It will be apparent to those skilled in the art that various changes in the form, proportion, and the `minor details of construction within the scope'ot the invention may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

I desire to cally special attention to .the feature in my invention which is in ractice' of great im ortance and that -is lt at -the clamp, as wil be understood from Figs'. y2 and 8, can be operated in one hand of the user, since it is only necessary for the operator to grasp the lever 7 or 29 in one hand and to insert the leather 10 inv osition, asindicated in said Figs. 2 and 8,. w ereupon by turning the le erand the clamp to the right. into the position seen in Figs. tand 7., res le'ctively, the leather 4will be firmly gri per without requiring further attention ont e part of the o eiator. I desire alsoto call attention to t e fact that vin my present invention the pull or force, ot' the connectionl 9 or 31 is exerted directly upon the lever 7 or 29 or its equi alent so that thereis `no necessity for passing said connection through an-eye or through a portionof the stationary jaw or its adjuncts, as has heretofore been done in devices of this character with which I It will be ap arent that in my invention I provide two re atively movable jaws, one of which is provided with a top memberada ted to permit the insertion and gripping o iiat material, and having side members 4in which the other of said jaws is pivoted.

film- Having thus described my invention, what Iolaim as new and desire to secure by Letters Patent, is: upon the connection 3lv the clamp' will natu l. A clamp consisting of a stationary jaw having downwardly turned sides, out away at the top and sides to allow a portion of the top to form a rearwardly projecting gripping edge, and a movable jaw pivoted to the sides of the fixed jaw near the `top thereof and to the rear of the rearward projection thereof causing the gripping edges of the jaws to approach substantially within a plane per endicularto the plane of the top of the 'xed jaw and beneath said top.

2. A clamp consisting of a stationary jaw having a top .member provided with a rearwardly projectin portion and having its sides cut away be ow the top, to permit the insertion and gripping of flat material, a

movable jaw pivoted to said stationary jaw,

thepi fot. beingv located slightly below lthe -plane ofV the stationary top member and tov one side of the jaw thereof, sothat the top of the movable jaw approaches the under` side of the 4fixed jaw approximately .perpendicularly to `said plane, whereby the material is-gripped between `the juxtaposed angular portions of said jaws-, v

3. A clampl consisting of a stationary jaw having a' top member provided with a rearwardlyA projecting portion and 'having its sides cut away below the top to permit the insertion and rip in of flat material, alever of subst ant i'alIy j having its extremity serving as a movable jaw and ivoted to said stationary jaw, the

,edge of t e movable jaw in itsl closing move- .ment meeting the edge ofthe stationary jaw, and pivoted, so as to approach perpendicu larly to the lane ,of said stationary jaw, the pivot of sai movable jaw located at a point slightly below the bight of the jaws, and out of alinement witha lane vertical to said stationary jaw, and t e outer terminals of the movable jaw being extended beyond the clamp body and adapted to have the tension` device attached directly thereto, whereby said tension device exerts its .pull on said clamp through said movable jaw.

CLIFTON T. MITCHELL.

Witnesses:

, E; HAYWARD FAIRBANKS,4

C. D. McVAY.

t e s tape of an obtuse angle. 

